ECG R-Peak Detection Using Template Matching

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Solution Overview

Problem

Conventional R-peak detection methods in ECG signals are prone to noise interference, often misidentifying intense T-peaks as R-peaks, necessitating a robust detection technique.

Innovation Solution

An apparatus and method utilizing an ECG template for R-peak detection, where the ECG signal is compared to a pre-stored template to determine similarity, with intervals exceeding a threshold value identified as R-peaks, minimizing noise influence and T-peak misidentification.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional differentiation or wavelet methods are used for R-peak detection, then the detection process can be performed, but the detection accuracy deteriorates due to noise interference and misidentification of T-peaks as R-peaks

Engineering Contradiction:
ImproveR-peak detection accuracyVSAvoidnoise interference and T-peak misidentification
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses a stored template of a normal ECG waveform as a reference copy. Instead of relying solely on differentiation or wavelet transformation of the input signal, the system compares the input ECG signal directly against the stored normal ECG template to identify R-peaks, thereby reducing the impact of noise and misidentification

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The stored ECG template acts as an intermediary reference standard. The system uses this template as a mediator between the input noisy ECG signal and the detection algorithm, comparing the signal characteristics against the template to determine R-peaks, which filters out false detections from noise and T-peaks

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS9119546B2R-PEAK detection apparatus and control method thereof
Publication Date: 2015.09.01 IND ACADEMIC COOP FOUND YONSEI UNIV
  • US9119546B2 patent drawing
  • US9119546B2 patent drawing
  • US9119546B2 patent drawing

AI summary

A method of controlling of an R-peak detection apparatus, which detects an R-peak from an ElectroCardioGram (ECG) signal, includes receiving the ECG signal, reading out a pre-stored ECG template, comparing the EG signal with the pre-stored ECG template to determine a similarity between the ECG signal and the pre-stored ECG template and determining whether the similarity is equal to or greater than a threshold value, and determining a corresponding interval as the R-peak when the similarity is equal to or greater than the threshold value.